[R] Can't figure out warning message
P Ehlers
ehlers at math.ucalgary.ca
Tue Nov 22 01:12:02 CET 2005
My guess is that you have an object 'T' hanging around.
Like Berton, I get no error until I define:
T <- 0:1
and then run your test case, resulting in the warnings.
Peter
Ravi Varadhan wrote:
> Hi,
>
>
>
> I apologize for the previous posting, where the message was not formatted
> properly. Here is a better version:
>
>
>
> I have written the following function to check whether a vector has elements
> satisfying monotonicity.
>
>
>
> is.monotone <- function(vec, increase=T){
>
> ans <- TRUE
>
> vec.nomis <- vec[!is.na(vec)]
>
> if (increase & any(diff(vec.nomis,1) < 0, na.rm=T)) ans <- FALSE
>
> if (!increase & any(diff(vec.nomis,1) > 0, na.rm=T)) ans <- FALSE
>
> ans
>
> }
>
>
>
> This works correctly, but I get this error message as below.
>
>
>
>
>>x <- 2:10
>
>
>>is.monotone(x)
>
>
> [1] TRUE
>
> Warning messages:
>
> 1: the condition has length > 1 and only the first element will be used in:
> if (increase & any(diff(vec.nomis, 1) < 0, na.rm = T)) ans <- FALSE
>
> 2: the condition has length > 1 and only the first element will be used in:
> if (!increase & any(diff(vec.nomis, 1) > 0, na.rm = T)) ans <- FALSE
>
>
>
>
>
> I am unable to see why the condition should have a length greater than 1,
> since "any" should give me a single logical value.
>
>
>
> Can any one tell me what is going on here? (I am using version 2.1.1 on
> Windows).
>
>
>
> Thanks very much,
>
> Ravi.
>
>
>
> --------------------------------------------------------------------------
>
> Ravi Varadhan, Ph.D.
>
> Assistant Professor, The Center on Aging and Health
>
> Division of Geriatric Medicine and Gerontology
>
> Johns Hopkins University
>
> Ph: (410) 502-2619
>
> Fax: (410) 614-9625
>
> Email: <mailto:rvaradhan at jhmi.edu> rvaradhan at jhmi.edu
>
> --------------------------------------------------------------------------
>
>
>
>
> [[alternative HTML version deleted]]
>
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--
Peter Ehlers
Department of Mathematics and Statistics
University of Calgary, 2500 University Dr. NW ph: 403-220-3936
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